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Journal of Optometry

Bruce J W Evans, Peter M Allen
No abstract text is available yet for this article.
May 9, 2017: Journal of Optometry
James Q Truong, Nabin R Joshi, Kenneth J Ciuffreda
PURPOSE: There have been several studies investigating static, baseline pupil diameter in visually-normal individuals across refractive error. However, none have assessed the dynamic pupillary light reflex (PLR). In the present study, both static and dynamic pupillary parameters of the PLR were assessed in both the visually-normal (VN) and the mild traumatic brain injury (mTBI) populations and compared as a function of refractive error. METHODS: The VN population comprised 40 adults (22-56 years of age), while the mTBI population comprised 32 adults (21-60 years of age) over a range of refractive errors (-9...
March 2, 2017: Journal of Optometry
Stephanie Rosemann, Inga-Maria Wefel, Volkan Elis, Manfred Fahle
OBJECTIVE: Detection and identification of moving targets is of paramount importance in everyday life, even if it is not widely tested in optometric practice, mostly for technical reasons. There are clear indications in the literature that in perception of moving targets, vision and hearing interact, for example in noisy surrounds and in understanding speech. The main aim of visual perception, the ability that optometry aims to optimize, is the identification of objects, from everyday objects to letters, but also the spatial orientation of subjects in natural surrounds...
February 23, 2017: Journal of Optometry
Charles W McMonnies
No abstract text is available yet for this article.
April 2017: Journal of Optometry
Jennifer A Ebeigbe, Chike Martin Emedike
PURPOSE: Most causes of childhood blindness are treatable or preventable. Knowledge of parents' awareness and perception of eye problems is important in helping to understand parents' eye care seeking behavior. This understanding becomes necessary as early detection and intervention can be effective when done at an early age. METHOD: Study was carried out in Benin City, Nigeria. Thirty-five parents aged 38-54 years with a mean age of 43(±2) years were recruited...
April 2017: Journal of Optometry
Fatih Özcura, Nilgün Yıldırım, Emre Tambova, Afsun Şahin
PURPOSE: To compare the intraocular pressure (IOP) measurements obtained with the rebound tonometry (RT), dynamic contour tonometry (DCT) and Goldmann applanation tonometry (GAT) in keratoconic corneas and to investigate the effects of central corneal thickness (CCT) and corneal radius of curvature (CR) on IOP measurements. METHODS: Sixty-three eyes of 63 keratoconus patients were enrolled in this cross-sectional study. IOP was measured on each subject always in the same order, ICare RT-Pascal DCT-GAT, after a minimum interval of 10min between measurements...
April 2017: Journal of Optometry
David P Piñero, Begoña Monllor, Vicente J Camps, Dolores de Fez
Systemic lupus erythematosus (SLE) is a multiorgan autoimmune disease of unknown etiology with many clinical manifestations. We report the first case of SLE in which visual alterations were evaluated with multichannel perimetry. Some achromatic and color vision alterations may be present in SLE, especially when treated with hydroxychloroquine. The sensitivity losses detected in the chromatic channels in the central zone of the visual field were consistent with the results of the FM 100 Hue color test. Likewise, the multichannel perimetry detected sensitivity losses in the parafoveal area for both chromatic channels, especially for the blue-yellow...
April 2017: Journal of Optometry
Patama Bhurayanontachai, Suwapat Saengkaew, Penjamaporn Apiromruck
PURPOSE: Pupillary dilatation with three types of eye drops is used regularly in the clinic; however, a mixture of these drops in a single bottle may be more beneficial in reducing workloads and resources. This study compared the efficacy in pupillary dilatation between two protocols of dilating drop instillation. METHODS: This prospective, randomized, comparative study included 30 eligible Thai patients. The patients randomly received preoperative pupillary dilatations by either the conventional protocol (1% tropicamide (T), 10% phenylephrine (P) and 0...
April 2017: Journal of Optometry
Balsam Alabdulkader, Susan Jennifer Leat
PURPOSE: Near visual acuity is an essential measurement during an oculo-visual assessment. Short duration continuous text reading charts measure reading acuity and other aspects of reading performance. There is no standardized version of such chart in Arabic. The aim of this study is to create sentences of equal readability to use in the development of a standardized Arabic continuous text reading chart. METHODS: Initially, 109 Arabic pairs of sentences were created for use in constructing a chart with similar layout to the Colenbrander chart...
April 2017: Journal of Optometry
Charles W McMonnies
Apart from the risk of developing glaucoma there is also the risk that it is not detected and irreversible loss of vision ensues. Some studies of methods of glaucoma diagnosis have examined the results of instrument-based examinations with great if not complete reliance on objective findings in arriving at a diagnosis. The very valuable advances in glaucoma detection instrument technologies, and apparent increasing dependence on them, may have led to reduced consideration of information available from a patient history in those studies...
April 2017: Journal of Optometry
Samira Heydarian, Monireh Mahjoob, Ahmad Gholami, Sajjad Veysi, Morteza Mohammadi
PURPOSE: This study was performed to investigate whether occupationally related color vision deficiency can occur from welding. METHODS: A total of 50 male welders, who had been working as welders for at least 4 years, were randomly selected as case group, and 50 age matched non-welder men, who lived in the same area, were regarded as control group. Color vision was assessed using the Lanthony desatured panel D-15 test. The test was performed under the daylight fluorescent lamp with a spectral distribution of energy with a color temperature of 6500K and a color rendering index of 94 that provided 1000lx on the work plane...
April 2017: Journal of Optometry
Albert Daxer, Armin Ettl, Robert Hörantner
PURPOSE: To study long-term results of MyoRing treatment of keratoconus. METHODS: Retrospective study of MyoRing implantation into a corneal pocket for keratoconus. RESULTS: Corneal thickness at the thinnest point remained unchanged, SIM K's, manifest sphere and cylinder were significantly improved at the first follow-up 9 months postoperatively and remained stable until the last follow-up about 5 years after surgery. Uncorrected and corrected distance visual acuity (UDVA, CDVA) were significantly improved at the first follow-up 9 months postoperatively and were further ameliorated until the last follow-up about 5 years after surgery...
April 2017: Journal of Optometry
Ymie J van der Zee, Peter Stiers, Heleen M Evenhuis
PURPOSE: To determine whether the assessment of visual acuity ratios might improve the referral of children with (sub)normal visual acuity but at risk of cerebral visual impairment. METHODS: In an exploratory study, we assessed visual acuity, crowding ratio and the ratios between grating acuity (Teller Acuity Cards-II) and optotype acuity (Cambridge Crowding Cards) in 60 typically developing school children (mean age 5y8m±1y1m), 21 children with ocular abnormalities only (5y7m±1y9m) and 26 children with (suspected) brain damage (5y7m±1y11m)...
April 2017: Journal of Optometry
Morgan Berry, Linda J H Lucas
Choroidal hemangioma is a rare congenital ocular tumor that can present as either circumscribed or diffuse. Circumscribed choroidal hemangioma (CCH) typically manifests as a red-orange mass within the posterior pole and appears similar to other ocular conditions, such as choroidal melanoma and choroidal metastasis. Proper diagnosis is crucial and is aided by the use of ancillary testing. CCH itself is benign but can cause secondary complications such as subretinal fluid accumulation and subsequent retinal detachment...
April 2017: Journal of Optometry
Avesh Raghunandan, Berta Karmazinaite, Andrea S Rossow
PURPOSE: Letter sequence recognition accuracy has been postulated to be limited primarily by low-level visual factors. The influence of high level factors such as visual memory (load and decay) has been largely overlooked. This study provides insight into the role of these factors by investigating the interaction between letter sequence recognition accuracy, letter string length and report condition. METHODS: Letter sequence recognition accuracy for trigrams and pentagrams were measured in 10 adult subjects for two report conditions...
February 18, 2017: Journal of Optometry
Jorge A Calvo-Sanz, Javier Ruiz-Alcocer, Miguel A Sánchez-Tena
PURPOSE: To compare and analyze the interchangeability of three measuring systems, each based on a different technique, for central corneal thickness (CCT) analysis. METHODS: CCT measurements were measured using optical coherence tomography (OCT), non-contact specular microscopy (NCSM), and ultrasonic pachymetry (USP) in 60 eyes of 60 healthy patients with a mean age of 66.5±15.0 years and a mean spherical equivalent of 0.43±1.14 D. Analysis of variations in measurement concordance and correlation among the three different methods were performed...
February 18, 2017: Journal of Optometry
Neeraj Kumar Singh, Revathy Mani, Jameel Rizwana Hussaindeen
PURPOSE: To evaluate the changes in the stimulus and response Accommodative Convergence to Accommodation (AC/A) ratio following vision therapy (VT) in Convergence Insufficiency (CI). METHODS: Stimulus and response AC/A ratio were measured on twenty five CI participants, pre and post 10 sessions of VT. Stimulus AC/A ratio was measured using the gradient method and response AC/A ratio was calculated using modified Thorington technique with accommodative responses measured using WAM-5500 open-field autorefractor...
January 23, 2017: Journal of Optometry
Manuel Rodríguez-Vallejo, Diego Montagud, Juan A Monsoriu, Walter D Furlan
No abstract text is available yet for this article.
January 11, 2017: Journal of Optometry
Philip G Griffiths, Robert H Taylor, Lisa M Henderson, Brendan T Barrett
No abstract text is available yet for this article.
January 4, 2017: Journal of Optometry
Antonio Lopez Alemany, Vicente Compañ Moreno, Jesús Merayo Lloves, José M González-Méijome
No abstract text is available yet for this article.
January 2017: Journal of Optometry
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